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<div id='article-page'><div id='article-content' data-media-url='//news-app-staging.s3.amazonaws.com' data-base-url='//news-app-staging.herokuapp.com' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/pluto.mp3' data-capture-url='//staging.analytics.lingraphica.com/events/capture_news' data-article-title='US Spacecraft Flies by Pluto After Nine-Year Trip' data-article-id='615'><script src='//news-app-staging.herokuapp.com/javascripts/getscripts.js'></script><link rel='stylesheet' href='//news-app-staging.herokuapp.com/stylesheets/article.css' type='text/css' /><div class='article'><p><span data-start-time='0' data-end-time='10748'>It has taken more than nine years for an American spacecraft to reach the far edge of our solar system. </span> <span data-start-time='10748' data-end-time='19819'>The spacecraft, named New Horizons, sailed past the “dwarf” planet Pluto on Tuesday. </span> <span data-start-time='19819' data-end-time='28141'>New Horizons flew 4.88 billion kilometers to reach Pluto.</span> </p><p><span data-start-time='28141' data-end-time='40181'>The spacecraft completed the fly-by Tuesday morning, after reaching an area called the Kuiper Belt, which lies outside the planet Neptune. </span> <span data-start-time='40181' data-end-time='48821'>This success tops off a 50-year effort by scientists to explore our solar system.</span> </p><p><span data-start-time='48821' data-end-time='55238'>“It’s truly a mark in human history,” said John Grunsfeld. </span> <span data-start-time='55238' data-end-time='62290'>He is the associate administrator for science at NASA, the American space agency. </span> <span data-start-time='62290' data-end-time='70771'>He is with the mission control center at Johns Hopkins University’s Applied Physics Laboratory.</span> </p><p><span data-start-time='70771' data-end-time='85465'>The spacecraft is so far from Earth, that radio signals, traveling at the speed of light, take about four-and-a-half hours to reach scientists on our planet. </span> <span data-start-time='85465' data-end-time='90499'>More information is expected to arrive Tuesday night. </span> <span data-start-time='90499' data-end-time='104195'>That is when New Horizons is expected to send final word that it has passed some 12,550 kilometers from Pluto.</span> </p><p><span data-start-time='104195' data-end-time='114739'>“We will get information from the spacecraft and know if it’s healthy,” said Alice Bowman, the mission operations manager.</span> </p><p><span data-start-time='114739' data-end-time='121746'>By that time, New Horizons will have spent almost a day in radio silence. </span> <span data-start-time='121746' data-end-time='131905'>It has been quiet while it works on a series of observations as it flies past Pluto and its five moons. </span> <span data-start-time='131905' data-end-time='140612'>New Horizons is traveling at speeds of about 14 kilometers per second.</span> </p><p><span data-start-time='140612' data-end-time='145442'>The spacecraft is about the size of a baby grand piano. </span> <span data-start-time='145442' data-end-time='148639'>It is fueled by nuclear power. </span> <span data-start-time='148639' data-end-time='156735'>For several hours after the closest pass by Pluto, New Horizons will look back at the planet. </span> <span data-start-time='156735' data-end-time='164104'>It will study its atmosphere using radio signals sent from Earth as aprobe. </span> <span data-start-time='164104' data-end-time='173651'>New Horizons does not have the ability to fire rockets to slow down and go into orbit around Pluto. </span> <span data-start-time='173651' data-end-time='183265'>So its cameras and scientific instruments must work on the fly, without slowing down.</span> </p><p><span data-start-time='183265' data-end-time='186825'>Scientists want to know more about Pluto. </span> <span data-start-time='186825' data-end-time='195850'>When New Horizons was launched in 2006, Pluto was considered our solar system’s ninth planet. </span> <span data-start-time='195850' data-end-time='208277'>But since then scientists decided it was a “dwarf planet” after other Pluto-like ice and rock worlds were discovered in the Kuiper Belt.</span> </p><p><span data-start-time='208277' data-end-time='219705'>Those objects are believed to be left over pieces from the creation of the solar system some 4.6 billion years ago. </span> <span data-start-time='219705' data-end-time='227279'>Scientists will have to be patient to wait to receive all of New Horizons’ information. </span> <span data-start-time='227279' data-end-time='238753'>It will take about 16 months for the spacecraft to send back all the images and other data taken during the Pluto flyby. </span> <span data-start-time='238753' data-end-time='244467'>By then, it will have traveled even deeper into the Kuiper Belt. </span> <span data-start-time='244467' data-end-time='252086'>There it may be heading for a possible visit with one of Pluto’s neighbors.</span> </p><p><span data-start-time='252086' data-end-time='254127'>I’m Anne Ball.</span> </p></div><div class='control-buttons-sticky' style='display:none;'><div class='control-buttons'><button title='Back' class='back' disabled='disabled'></button><button title='Play' class='play' disabled='disabled'></button><button title='Pause' class='pause' style='display:none;'></button><button title='Forward' class='forward' disabled='disabled'></button><button class='finished-reading' style='display:none;'>Done</button></div></div></div><div id='article-media'><div id='media-image'><img src='https://news-app-production.s3.amazonaws.com/articles/300/pluto_image.jpg'/></div></div><div id='question-content' style='display:none;'><div class='vocabulary_question question-container' data-question-id=3323 data-hint-location='156735' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/what_does_probe_mean.m4a'>What does <strong>probe</strong> mean?</div><div class='choices' data-correct-choice='an instrument that is used for examining something'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/the_main_idea.m4a'><span>the main idea</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/an_instrument_that_is_used_for_examining_something.m4a'><span>an instrument that is used for examining something</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/something_of_relatively_small_size.m4a'><span>something of relatively small size</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/the_solar_system.m4a'><span>the solar system</span></div></div></div><div class='vocabulary_question question-container' data-question-id=3324 data-hint-location='10748' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/what_does_dwarf_mean.m4a'>What does <strong>dwarf</strong> mean?</div><div class='choices' data-correct-choice='something of relatively small size'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/the_main_idea.m4a'><span>the main idea</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/a_probe.m4a'><span>a probe</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/something_of_relatively_small_size.m4a'><span>something of relatively small size</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/the_solar_system.m4a'><span>the solar system</span></div></div></div><div class='vocabulary_question question-container' data-question-id=3325 data-hint-location='40181' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/what_does_solar_system_mean.m4a'>What does <strong>solar system</strong> mean?</div><div class='choices' data-correct-choice='our sun and the planets that move around it'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/the_main_idea.m4a'><span>the main idea</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/a_probe.m4a'><span>a probe</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/something_of_relatively_small_size.m4a'><span>something of relatively small size</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/our_sun_and_the_planets_that_move_around_it.m4a'><span>our sun and the planets that move around it</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=3326 data-hint-location='19819' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/where_was_new_horizons_sent.m4a'>Where was New Horizons sent?</div><div class='choices' data-correct-choice='Pluto'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/pluto.m4a'><span>Pluto</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/jupiter.m4a'><span>Jupiter</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/the_sun.m4a'><span>the Sun</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/venus.m4a'><span>Venus</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=3327 data-hint-location='10748' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/what_is_the_name_of_the_spacecraft.m4a'>What is the name of the spacecraft?</div><div class='choices' data-correct-choice='New Horizons'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/new_horizons.m4a'><span>New Horizons</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/voyager.m4a'><span>Voyager</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/dwarf_planet.m4a'><span>Dwarf Planet</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/pluto.m4a'><span>Pluto</span></div></div></div><div class='multiple_choice_question question-container' data-question-id=3328 data-hint-location='0' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/how_long_has_it_taken_the_spacecraft_to_travel_to_its_current_location.m4a'>How long has it taken the spacecraft to travel to its current location?</div><div class='choices' data-correct-choice='nine years'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/ninety_years.m4a'><span>ninety years</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/nine_years.m4a'><span>nine years</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/nine_months.m4a'><span>nine months</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/nine_days.m4a'><span>nine days</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=3329 data-hint-location='156735' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/new_horizons_will_study_plutos__blank__using_radio_signals.m4a'>New Horizons will study Pluto's <span class='blank'>atmosphere</span> using radio signals.</div><div class='choices' data-correct-choice='atmosphere'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/atmosphere.m4a'><span>atmosphere</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/surface.m4a'><span>surface</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/moon.m4a'><span>moon</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/neighbors.m4a'><span>neighbors</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=3330 data-hint-location='140612' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/the_spacecraft_is_about_the_size_of_a__blank__.m4a'>The spacecraft is about the size of a <span class='blank'>piano</span>. </div><div class='choices' data-correct-choice='piano'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/car.m4a'><span>car</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/microwave.m4a'><span>microwave</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/piano.m4a'><span>piano</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/house.m4a'><span>house</span></div></div></div><div class='sentence_completion_question question-container' data-question-id=3331 data-hint-location='28141' style='display:none;'><div class='question' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/the_kuiper_belt_lies_outside_the_planet__blank_.m4a'>The Kuiper Belt lies outside the planet <span class='blank'>Neptune</span>.</div><div class='choices' data-correct-choice='Neptune'><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/earth.m4a'><span>Earth</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/pluto.m4a'><span>Pluto</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/saturn.m4a'><span>Saturn</span></div><div class='choice' data-sound-name='https://news-app-production.s3.amazonaws.com/articles/300/neptune.m4a'><span>Neptune</span></div></div></div><div class='question-buttons'><button class='skip-button'></button><button class='hint-button'></button><button class='speak-button'></button></div></div></div>
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